Table 2

Associated effects of smoke-free legislation extensions on overall myocardial infarction incidence, stratified by age and sex

AMI incidence per 1 000 000 populationOverall≥65 years<65 yearsMaleFemale
Underlying trend
 β (95% CIs)0.9 (0.7 to 1.1)5.1 (3.3 to 7.0)0.6 (0.4 to 0.8)1.9 (1.5 to 2.4)1.0 (0.6 to 1.3)
 P value0.0010.0010.0010.0010.001
2013 step-change
 β (95% CIs)−3.7 (−11.8 to 4.4)−14.6 (−78.9 to 49.7)−4.2 (−9.3 to 0.8)−14.5 (−28.0 to –1.0)4.9 (−5.3 to 15.1)
 P value0.3680.6550.0990.0350.343
Post 2013-trend
 β (95% CIs)−0.6 (−1.0 to –0.29)−5.9 (−8.7 to –3.1)−0.4 (−0.6 to –0.2)−1.1 (−1.7 to –0.5)−0.9 (−1.4 to –0.4)
 P value<0.001<0.001<0.001<0.001<0.001
2016 step-change
 β (95% CIs)14.2 (3.3 to 25.0)114.4 (36.2 to 192.5)6.4 (−2.8 to 15.5)28.6 (13.1 to 44.0)17.3 (−11.1 to 45.6)
 P value0.0110.0040.175<0.0010.233
Post-2016 trend
 β (95% CIs)0.2 (−1.0 to 1.3)3.1 (−6.8 to 13.0)−0.3 (−1.3 to 0.6)−0.1 (−1.7 to 1.4)0.19 (−2.2 to 2.6)
 P value0.7880.5370.4970.8520.875
2017 step-change
 β (95% CIs)−7.2 (−18.2 to 3.7)−71.4 (−198.6 to 55.8)−0.8 (−10.1 to 8.5)−8.0 (−26.4 to 10.4)−12.5 (−30.1 to 5.2)
 P value0.1950.2720.8680.3920.166
Post-2017 trend
 β (95% CIs)0.5 (−0.7 to 1.7)1.0 (−9.7 to 11.8)0.4 (−0.6 to 1.4)0.4 (−1.2 to 2.0)0.9 (−1.4 to 3.3)
 P value0.4580.8530.3920.6230.437
AIC845.91368.4776.21005.5934.7
BIC882.21401.8812.41041.8971.0